dotted vertical lines between notes

[jim altieri]

Hi everybody,
 In a proportional notation score, I'd like to be able to draw dotted 
vertical lines between pairs (or groups) of notes that have simultaneous 
attacks.  I have a feeling that if it's possible it uses the GridLines 
function, but I'm not sure how to make it only go between certain 
staves.  I've included a short score to indicate what I mean... I'd like 
to draw dotted vertical lines between pairs of notes that in this 
example are colored red.
Thanks,
jim altieri



\version "2.10.0"

\header {
}



staffViolin = \new Staff  {
   \time 4/4
   \set Staff.instrument="Violin"
   \set Staff.midiInstrument="violin"
   \key c \major
   \clef treble
   \relative c' {    
       c1*1/9 d1*1/9 e1*1/9 \once \override NoteHead #'color = #red 
f1*1/9 g1*1/9 a1*1/9 \once \override NoteHead #'color = #red b1*1/9 
c1*1/9 d1*1/9
       c,1*1/10 d1*1/10 \once \override NoteHead #'color = #red e1*1/10 
f1*1/10 \once \override NoteHead #'color = #red g1*1/10 a1*1/10 \once 
\override NoteHead #'color = #red b1*1/10 c1*1/10 \once \override 
NoteHead #'color = #red d1*1/10 e1*1/10
   \bar "|."
   }

}
staffViolinII = \new Staff  {
   \set Staff.instrument="Violin"
   \set Staff.midiInstrument="violin"
   \key c \major
   \clef treble
   \relative c' {    
       c1*1/3 \once \override NoteHead #'color = #red d1*1/3 \once 
\override NoteHead #'color = #red e1*1/3 f1*1/3 g1*1/3 a1*1/3

   \bar "|."
   }

}
staffViola = \new Staff  {
   \set Staff.instrument="Viola"
   \set Staff.midiInstrument="viola"
   \key c \major
   \clef alto
   \relative c' {    
   c1*1/5 d1*1/5 e1*1/5 f1*1/5 g1*1/5 a1*1/5 \once \override NoteHead 
#'color = #red b1*1/5 \once \override NoteHead #'color = #red c1*1/5 
\once \override NoteHead #'color = #red d1*1/5 \once \override NoteHead 
#'color = #red e1*1/5

   \bar "|."
   }

}



\score {
   <<
       \staffViolin
       \staffViolinII
       \staffViola
   >>
  
   \layout  {
   }
}

\paper {
}